Plant growth tube



FIG. 1 is a front elevational view of the assembled plant growth tube.

FIG. 2 is a rear elevational view of the assembled plant growth tube.

FIG. 3 is a left elevational view of the assembled plant growth tube.

FIG. 4 is a right elevational view of the assembled plant growth tube.

FIG. 5 is a top view of the assembled plant growth tube.

FIG. 6 is a bottom view of the assembled plant growth tube.

FIG. 7 is a front elevational view of the unassembled plant growth tube; and,

FIG. 8 is an enlarged, fragmented front elevational view of the assembled plant growth tube. 

The ornamental design for a plant growth tube, as shown. 